More Benchmarks

[Dave Martindale]

We upgraded one of our Silicon Graphics IRIS 2400's to the "Turbo"
(68020 processor) this week, so I decided to do some benchmarking of it
against the older 68010 processor.

When I tried the Dhrystone benchmark, I found that the number being
computed is actually iterations divided by execution time in seconds.
Since this time is only accurate to plus or minus one second, numbers
for machines like the Sun 3 (at 3500) may have errors of 7%.
To get better accuracy, I changed the #define LOOPS from 50000 to
200000 for the 2400 and to 500000 for the 2400T.

It's apparent that the results for the Sun 3 are no fluke, and that
the 68020 is a pretty respectable processor.  Of course, this particular
benchmark may be unusually favourable to this chip.

Below are all of the results that I could find posted, merged into
a single table.

Since this isn't a program source, it doesn't really belong in net.sources.
I've added a Followup-to header that will redirect followups to
net.unix-wizards, which is at least a bit better suited to this.

 * MACHINE	PROCESSOR	OPERATING	COMPILER	DHRYSTONES/SEC.
 * TYPE				SYSTEM				NO REG	REGS
 * --------------------------	------------	-----------	---------------
 * IBM PC/XT	8088-4.77Mhz	VENIX/86 2.0	cc		 297	 324
 * Cosmos	68000-8Mhz	UniSoft		cc		 305	 322
 * IBM PC/XT	8086-4.54Mhz	PCDOS 3.1	Lattice 2.15	 373	  -  @
 * IBM PC/XT	8088-4.77Mhz	PCDOS 2.1	Lattice 2.15	 403	  -  @
 * ATT PC6300	8086-8Mhz	MSDOS 2.11	b16cc 2.0	 632	 684
 * IBM PC/AT	80286-6Mhz	PCDOS 3.0	CI-C86 2.1	 666	 684
 * Macintosh	68000-7.7Mhz	-		MegaMax C 2.0	 661	 709
 * ATT PC6300	8086-8Mhz	MSDOS 2.11	CI-C86 2.20M	 769	 769
 * IBM PC/AT	80286-6Mhz	PCDOS 3.0	CI-C86 2.1	 666	 684
 * Macintosh	68000-7.8Mhz 2M	Mac Rom		Mac C 32 bit int 694	 704
 * IBM PC/XT	8086-9.54Mhz	PCDOS 3.1	Microsoft 3.0	 724	 781
 * ATT 3B2/300	MAC32-?Mhz	UNIX 5.0.2	cc		 735	 806
 * NEC PC9801F	8086-8Mhz	PCDOS 2.11	Lattice 2.15	 768	  -  @
 * ATT PC6300	8086-8Mhz	MSDOS 2.11	CI-C86 2.20M	 769	 769
 * IRIS 2400	68010-10 MHz	Sys5 #5		cc		 772	 829
 * IBM PC/XT	8086-9.54Mhz	PCDOS 3.1	Microsoft 3.0	 819	 877
 * Fast Mac	68000-7.7Mhz	-		MegaMax C 2.0	 839	 904 +
 * IBM PC/AT	80286-6Mhz	VENIX/86 2.1	cc		 961	1000
 * VAX 11/750	-		Unix 4.2bsd	cc		 862	 877
 * Macintosh	68000-7.8Mhz 2M	Mac Rom		Mac C 16 bit int 877	 909
 * IBM PC/XT	8086-9.54Mhz	PCDOS 3.1	Wizard 2.1	 877	 980
 * VAX 11/750	-		VMS		VAX-11 C 2.0	 958	1091
 * IBM PC/AT	80286-6Mhz	VENIX/86 2.1	cc		 961	1000
 * IBM PC/XT	8086-9.54Mhz	PCDOS 3.1	Lattice 2.15	 980	  -  @
 * ATT PC7300	68010-10Mhz	UNIX 5.2	cc		1041	1111
 * IBM PC/AT	80286-6Mhz	PCDOS 3.1	Microsoft 3.0	1063	1086
 * Sun2/120	68010-10Mhz	Sun 4.2BSD	cc		1136	1219
 * PDP 11/70	-		UNIX 5.2	cc		1162	1250
 * IBM PC/AT	80286-7.5Mhz	VENIX/86 2.1	cc		1190	1315 *
 * IBM PC/AT	80286-6Mhz	PCDOS 3.1	Lattice 2.15	1250	  -  @
 * VAX 11/780	-		UNIX 5.2	cc		1515	1562
 * ATT 3B20	-		UNIX 5.2	cc		1515	1724
 * uVAX-II	-		?		?		1574	1582
 * Gould PN6005	-		UTX 1.1(4.2BSD)	cc		1675	1964
 * HP9000-500   B series CPU    HP-UX 4.02      cc		1724      -
 * DEC2060	KL-10		TOPS-20		cc(&)		2000	----
 * Pyramid 90x  -		OSx 2.5		cc		3125    3125
 * IRIS 2400T	68020-16.67MHz	Sys5 #14	cc		3105	3401
 * SUN 3/75	68020-16.67Mhz	SUN 4.2 V3	cc		3333	3571
 * VAX 8600	-		4.3BSD		cc		7092	7153
 * Amdahl 580	-		UTS 5.0 Rel 1.2	cc Ver. 1.5    23076   23076
 *
 *   * 15Mhz crystal substituted for original 12Mhz;
 *   @ vanilla Lattice compiler used with MicroPro standard library
 *   + This Macintosh was upgraded from 128K to 512K in such a way that
 *     the new 384K of memory is not slowed down by video generator accesses.
 *   & A version 7 C compiler written at New Mexico Tech.